ARDrone Flight PRO doesn't see the USB stick but freeflight has no problem with it:

the correct steps:
-insert stick
-power up the drone-in case of a non grounded stick you have to re-insert it and wait for the drone led's to flash
-connect to the drone wifi
-load up the app
-wait a few seconds for the remaining usb time to appear
-it should work

Today connected to drone verified license then downloaded map for California. Halted at 100% and stayed on screen saying downloading at 100%. Had to force failure by disconnecting internet and reconnecting to drone.

I noticed a problem I'm having but I'm not sure if its related to ARDrone Flight PRO or if its a 2.3.3 firmware issue.
After flying in one direction and then abruptly stopping to hover, the drone loses quite a bit of altitude before climbing again, but not reaching the original height.

I tested this with a 3 meter ceiling.
Flying at 2.89 meters at 12 degrees I believe, I stopped and the drone dropped almost to the ground, and then raised up about 2 meters.
The HUD reported over 4 meters, however the drone was still lower than the original 2.89 meters before the stop.

Is this the "dirty air" or "swoop" effect that some are talking about?
Is there a fix?

Thanks for the reply. I think you are right about the over grass thing. I fly in my front yard since iI have enough space to do so. It's a mix of grass and concrete but the drops seem to happen over grass. I guess the ultra sonic sensor doesn't work as well over grass? is there no error checking with the altitude? the drone seemed to know where the new actual 3 meters was bud the HUD now read about 4.5 meters.

The ultrasonic sensors on the bottom work best with a solid surface for good echo... Grass is a pretty effective dampener , absorbing a lot of potential echo and throwing back multiple echoes that can confuse the sensor... Make it work harder

As far as accuracy is concerned... ARDF Pro is only displaying numbers being provided by the parrot firmware in the drone... Even the freeflight program has a data overlay available in the academy that will lose all it's accuracy.... After climbing and dropping altitude a few times the numbers are all over the place... I've seen it on my sons iPod touch when I'm hovering at eye level after a good 15 minute fun flight and when I watch the video with data overlay in the academy later it's showing my altitude at 7 meters.

All due to parrot trying to be as economical as possible with hardware and still provide something that basically does the job for a decent price I guess

Now iI have to ask how you are getting 15 minutes. iI assume a higher capacity battery. I've looked around at bigger batteries but haven't bought one yet since iI also need to get a charger as well. I did see an adapter somewhere online that plugs into the V2 charger that let's you charge aftermarket batteries. interested to hear what you use/like.